Disposable diaper for pets

ABSTRACT

A disposable diaper to be fit around the waist of the pet, having: a rear-side waist area; a stomach-side waist area; a crotch area; end sections in the diaper longitudinal direction; end sections in a diaper longitude-intersecting direction; a tail insertion opening; an absorbent core; an area not having the absorbent core arranged therein; an attachment section in the stomach-side waist area; an attachment area that receives the attachment section; and an expandable/contractible elastic member for a leakage-prevention sheet arranged, in an extended state, in the leakage-prevention sheet. The expandable/contractible elastic member is arranged in a prescribed area in the diaper longitudinal direction, between the absorbent core and the end section in the diaper longitude-intersecting direction. A standing-up section in which the end section in the diaper longitudinal direction stands up is formed as a result of the contraction of the expandable/contractible elastic member for the leakage-prevention sheet.

RELATED APPLICATIONS

The present application is a National Phase of International ApplicationNumber PCT/JP2013/080953, filed Nov. 15, 2013, and claims priority ofJapanese Patent Application No. 2012-272366 filed on Dec. 13, 2012.

TECHNICAL FIELD

The present invention relates to a disposable diaper for pets, and moreparticularly to a disposable diaper for pets that fits well around thewaist of the pet.

BACKGROUND ART

It is common to keep pets, typically dogs and cats, indoors. Therefore,various kinds of disposable diapers for pets are available. For example,a disposable diaper for pets as disclosed in Japanese Unexamined PatentApplication Publication JP 2004-159591 A is provided.

PRIOR ART DOCUMENT Patent Document

Patent Document 1:

JP 2004-159591 A

SUMMARY OF THE INVENTION Problem to be Solved by the Invention

The disposable diaper for pets (disposable pet diaper) disclosed in JP2004-159591A is now described with reference to FIGS. 21 and 22. FIG. 21is a plan view showing the disposable pet diaper in its unfolded state,and FIG. 22 is an explanatory drawing for illustrating a state of thedisposable pet diaper worn by a pet.

A disposable pet diaper 1000 includes a liquid-permeable sheet 9910, aliquid-resistant sheet (not shown) and an absorbent core 2000 disposedbetween the liquid-permeable sheet 9910 and the liquid-resistant sheet.

The liquid-permeable sheet 9910 is formed of liquid-permeable nonwovenfabric. The liquid-resistant sheet is formed of liquid-impermeableplastic film. The absorbent core 2000 is formed of a mixture of liquidabsorbent fibers such as pulp, and a super absorbent polymer.

The disposable pet diaper 1000 has an abdomen-side waist area 1110, aback-side waist area 1130 and a crotch area 1120 between theabdomen-side waist area 1110 and the back-side waist area 1130.

The disposable pet diaper 1000 has a diaper longitudinal direction inwhich the abdomen-side waist area 1110, the crotch area 1120 and theback-side waist area 1130 are contiguously formed, and a diapertransverse direction crossing the diaper longitudinal direction.

The abdomen-side waist area 1110 has an end 1110A and the back-sidewaist area 1130 has an end 1130A in the diaper longitudinal direction.

An abdomen-side flap 1150 is formed in the abdomen-side waist area 1110and has a back-side end 1150B. The back-side end 1150B is contiguouslyformed to extend from an end of the abdomen-side flap 1150 in the diapertransverse direction to a region of an end 2220 of the absorbent core2000 in the diaper transverse direction.

When the disposable pet diaper 1000 is put on a pet, a relatively longarea of the abdomen-side flap 1150 comes in contact with a leg α1 of thepet.

A fastening part 3000 having a plurality of hooks is provided on theabdomen-side flap 1150.

The absorbent core 2000 is disposed in a prescribed region extendingover the abdomen-side waist area 1110 and the crotch area 1120. A tailinsertion opening 1190 is formed in a prescribed position in the crotcharea 1120 and the back-side waist area 1130 where the absorbent core2000 is not provided.

A fastening region 9000 comprising a target tape is formed in aprescribed position of the back-side waist area 1130. In order to putthe disposable pet diaper 1000 on a pet, the hooks on the fastening part3000 are engaged with the fastening region 9000.

A back-side flap 1160 is formed in the back-side waist area 1130.

A leg stretchable elastic member 4000 is provided in the vicinity of anend of the disposable pet diaper 1000 in the diaper transversedirection. Leg gathers 4410 shown in FIG. 23 are formed by contractionof the leg stretchable elastic member 4000. The leg stretchable elasticmember 4000 is arranged to extend over part of the abdomen-side waistarea 1110 and the crotch area 1120. Therefore, the contraction force ofthe leg stretchable elastic member 4000 has no influence on the end1110A of the abdomen-side waist area 1110 and the end 1130A of theback-side waist area 1130.

A leakproof sheet 8000 is arranged to extend inward from the end in thediaper transverse direction of the disposable pet diaper 1000. Aleakproof sheet stretchable elastic member 6000 is provided in theleakproof sheet 8000. Leakproof gathers and a leakproof wall which arenot shown are formed by contraction of the leakproof sheet stretchableelastic member 6000.

An end of the leakproof sheet stretchable elastic member 6000 in theabdomen-side waist area does not extend up to the end 1110A of thedisposable pet diaper 1000 in the diaper longitudinal direction. Theback-side end of the leakproof sheet stretchable elastic member 6000 isarranged to extend beyond the tail insertion opening 1190.

In order to put the disposable pet diaper 1000 on a pet, the back-sidewaist area 1130 is placed on a back of the pet and the crotch area 1120and the abdomen-side waist area 1110 are placed on a crotch and anabdomen of the pet, and then the fastening part 3000 is fastened to thefastening region 9000.

In this prior art disposable pet diaper 1000, however, with thestructure in which the ends 1110A and 1130A are formed of theliquid-permeable sheet 9910, the liquid-resistant sheet and theleakproof sheet 8000, the end 1110A or 1130A may be turned up especiallyduring the work of putting the diaper on the pet, which may causetrouble in the work.

Especially when a pet wears the disposable pet diaper 1000 and excreteswith the end 1110A of the abdomen-side waist area 1110 remaining turnedup, excrement may leak out.

Accordingly, it is an object of the present invention to provide adisposable diaper for pets which fits well around the waist of the pet.

Means for Solving the Problem

In order to solve the above-described problem, according to a preferredaspect of the present invention, a disposable diaper for pets isprovided which includes an abdomen-side waist area, a back-side waistarea, and a crotch area between the abdomen-side waist area and theback-side waist area, a diaper longitudinal direction in which theabdomen-side waist area, the crotch area and the back-side waist areacontiguously extend when the disposable diaper is not worn by a pet, anda diaper transverse direction crossing the diaper longitudinaldirection, both ends in the diaper longitudinal direction, both ends inthe diaper transverse direction, a tail insertion opening formed in aprescribed region in the diaper longitudinal direction, an absorbentcore formed on one side of the tail insertion opening in the diaperlongitudinal direction and disposed in a prescribed region extendingover the crotch area and the abdomen-side waist area, an absorbent-corenon-arrangement region in which the absorbent core is not disposed, afastening part having a prescribed length and provided on theabdomen-side waist area, a fastening region provided in the back-sidewaist area and configured to receive the fastening part, a leakproofsheet arranged in the diaper longitudinal direction, and a leakproofsheet stretchable elastic member disposed in a stretched state in theleakproof sheet.

When the disposable diaper is put on the pet, the crotch area and theabdomen-side waist area cover a crotch and an abdomen of the pet, whilethe back-side waist area is closely fitted to a back of the pet, and thefastening part is fastened to the fastening region.

Further, the weight of the absorbent core after excretion is received inthe longitudinal direction of the fastening part while the disposablediaper is worn by the pet.

The leakproof sheet stretchable elastic member is disposed in aprescribed region in the diaper longitudinal direction between theabsorbent core and each of the ends in the diaper transverse direction.

Each of the ends in the diaper longitudinal direction is erected bycontraction of the leakproof sheet stretchable elastic member and formsan erected section.

In a further aspect of the solution according to the present invention,leakproof gathers are formed by contraction of the leakproof sheetstretchable elastic member.

In a further aspect of the solution according to the present invention,a leakproof wall is formed by contraction of the leakproof sheetstretchable elastic member.

In a further aspect of the solution according to the present invention,an erection sheet is provided in an end region of the absorbent-corenon-arrangement region in the diaper longitudinal direction, and theerection sheet is erected by contraction of the leakproof sheetstretchable elastic member and forms the erected section.

In a further aspect of the solution according to the present invention,the erection sheet comprises a waist stretchable elastic member.

In a further aspect of the solution according to the present invention,the waist stretchable elastic member is disposed in a stretched statebetween the absorbent core and each of the ends in the diaperlongitudinal direction and forms waist gathers by contracting.

In a further aspect of the solution according to the present invention,when the disposable diaper is ready to be put on the pet, the leakproofsheet stretchable elastic member is already contracted so that theerected section is already formed.

In a further aspect of the solution according to the present invention,while the disposable diaper is worn by the pet, the leakproof sheetstretchable elastic member is maintained in a contracted state so thatthe erected section is maintained in an erected state.

Effect of the Invention

In this invention, the ends in the diaper longitudinal direction areerected by contraction of the leakproof sheet stretchable elastic memberand form the erected sections. By provision of the erected sections, theshape of the ends in the diaper longitudinal direction is stabilized.Therefore, the disposable diaper for pets fits well around the waist ofthe pet.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view showing a disposable diaper for pets in itsunfolded state according to a first embodiment of the present invention.

FIG. 2 is a plan view for showing an absorbent-core non-arrangementregion in the unfolded state of the disposable diaper.

FIG. 3 is a plan view for showing a structure of an abdomen-side flap.

FIG. 4 is an explanatory drawing regarding to measurement for specifyinga preferable structure of the abdomen-side flap.

FIG. 5 is an explanatory drawing for illustrating the relation betweenthe disposable diaper and legs of the pet.

FIG. 6 is a plan view for showing a leakproof sheet fixed part in theunfolded state of the disposable diaper.

FIG. 7 is a sectional view taken along line A-A in FIG. 1.

FIG. 8 is a sectional view taken along line B-B in FIG. 1.

FIG. 9 is a sectional view taken along line C-C in FIG. 1.

FIG. 10 is an explanatory drawing for illustrating the structure of astretchable elastic member.

FIG. 11 is an explanatory drawing for illustrating the operation of thestretchable elastic member.

FIG. 12 is an explanatory drawing in a sectional view taken along lineD-D in FIG. 1.

FIG. 13 is an explanatory drawing regarding to a back-side waist area inputting the disposable diaper on a pet.

FIG. 14 is an explanatory drawing regarding to an abdomen-side waistarea in putting the disposable diaper on a pet.

FIG. 15 is an explanatory drawing for illustrating the state of thedisposable diaper worn by a pet.

FIG. 16 is a plan view showing a disposable diaper for pets in itsunfolded state according to a second embodiment of the presentinvention.

FIG. 17 is a plan view showing a disposable diaper for pets in itsunfolded state according to a third embodiment of the present invention.

FIG. 18 is a plan view showing a disposable diaper for pets in itsunfolded state according to a fourth embodiment of the presentinvention.

FIG. 19 is a plan view showing a disposable diaper for pets in itsunfolded state according to a fifth embodiment of the present invention.

FIG. 20 is a plan view showing a disposable diaper for pets in itsunfolded state according to a sixth embodiment of the present invention.

FIG. 21 is a plan view showing a prior art disposable diaper for pets inits unfolded state.

FIG. 22 is an explanatory drawing for illustrating a state of the priorart disposable diaper worn by a pet.

BEST MODES FOR CARRYING OUT THE INVENTION First Embodiment

A first embodiment of the present invention is now described withreference to FIGS. 1 to 15.

FIG. 1 is a plan view showing a disposable diaper for pets in itsunfolded state. The “pet” in this embodiment widely includes vertebrates(mammals, reptiles, birds and amphibians) and invertebrates, andtypically represents pets such as cats, dogs, rabbits, hamsters, horses,cows, pigs and goats. The term “unfolded state” as used in thisembodiment refers to the state in which an unused disposable diaper isunfolded or opened and a contraction force of a stretchable elasticmember is not developed.

A disposable diaper for pets (disposable pet diaper) 100 has anabdomen-side waist area 110, a back-side waist area 130 and a crotcharea 120 between the abdomen-side waist area 110 and the back-side waistarea 130. When the disposable pet diaper 100 is worn by a pet, theabdomen-side waist area 110, the back-side waist area 130 and the crotcharea 120 are in contact with an abdomen, a back and a crotch of the pet,respectively.

The abdomen-side waist area 110, the back-side waist area 130 and thecrotch area 120 are example embodiments that correspond to the“abdomen-side waist area, the back-side waist area and the crotch areabetween the abdomen-side waist area and the back-side waist area”,respectively, according to this invention.

In the unfolded state as shown in FIG. 1, the disposable pet diaper 100has a diaper longitudinal direction Y in which the abdomen-side waistarea 110, the crotch area 120 and the back-side waist area 130contiguously extend, and a diaper transverse direction X crossing thediaper longitudinal direction Y. The term “crossing” as used in thisspecification means “perpendicularly crossing” unless otherwisespecified.

The diaper longitudinal direction Y and the diaper transverse directionX are example embodiments that correspond to the “diaper longitudinaldirection in which the abdomen-side waist area, the crotch area and theback-side waist area contiguously extend when the disposable diaper isnot worn by a pet, and a diaper transverse direction crossing the diaperlongitudinal direction”, respectively, according to this invention.

The disposable pet diaper 100 has an inside surface 100Z1 which faces apet and an outside surface 100Z2 opposite to the inside surface 100Z1.

In this embodiment, the inside surface 100Z1 may also be referred to asa pet-side surface or a pet wearing surface.

The disposable pet diaper 100 has an end 110A formed in the abdomen-sidewaist area 110 and an end 130A formed in the back-side waist area 130 inthe diaper longitudinal direction Y.

The ends 110A and 130A are an example embodiment that corresponds to the“both ends in the diaper longitudinal direction” according to thisinvention.

The disposable pet diaper 100 has a pair of ends 100A in the diapertransverse direction X. Each of the ends 100A contiguously extends overan end 150A in the diaper transverse direction and a back-side end 150Bin an abdomen-side flap 150, an end 160A in the diaper transversedirection and an abdomen-side end 160B in a back-side flap 160, and aleg-side end 120A between the back-side end 150B of the abdomen-sideflap 150 and the abdomen-side end 160B of the back-side flap 160.

The ends 100A are an example embodiment that corresponds to the “bothends in the diaper transverse direction” according to this invention.

The disposable pet diaper 100 has a tail insertion opening 190 formed ina prescribed region in the diaper longitudinal direction Y. The tailinsertion opening 190 is formed by an arcuate cut 191 extending throughthe inside surface 100Z1 and the outside surface 100Z2.

Although, in the first embodiment, the tail insertion opening 190 isformed by the arcuate cut 191, it may be a circular opening formed by anannular cut.

The tail insertion opening 190 is an example embodiment that correspondsto the “tail insertion opening formed in a prescribed region in thediaper longitudinal direction” according to this invention.

The disposable pet diaper 100 has an absorbent core 200 formed on oneside of the tail insertion opening 190 in the diaper longitudinaldirection Y and disposed in a prescribed region extending over thecrotch area 120 and the abdomen-side waist area 110. The absorbent core200 has an abdomen-side end 210, a back-side end 220 and a pair of ends230 in the diaper transverse direction.

The absorbent core 200 is formed of a mixture of a particulate orfibrous super absorbent polymer and fluff pulp or a mixture of aparticulate or fibrous super absorbent polymer, fluff pulp andthermoplastic synthetic resin fibers. Preferably, in order to preventdeformation of the absorbent core 200 and falling off of the superabsorbent polymer, the absorbent core 200 may be entirely covered with aliquid-permeable sheet such as tissue paper and hydrophilic fibernonwoven fabric. Further, preferably, the absorbent core 200 may becompressed into a prescribed thickness in the manufacturing process. Asthe super absorbent polymer, synthetic polymer-based, starch-based orcellulose-based polymer can be appropriately used.

The absorbent core 200 is an example embodiment that corresponds to the“absorbent core formed on one side of the tail insertion opening in thediaper longitudinal direction and disposed in a prescribed regionextending over the crotch area and the abdomen-side waist area”according to this invention.

As shown in FIG. 2, a region of the disposable pet diaper 100 in whichthe absorbent core 200 is not disposed is referred to as anabsorbent-core non-arrangement region 170.

The absorbent-core non-arrangement region 170 is an example embodimentthat corresponds to the “absorbent-core non-arrangement region in whichthe absorbent core is not disposed” according to this invention.

In the absorbent-core non-arrangement region 170, regions adjacent tothe abdomen-side end 210 and the back-side end 220 of the absorbent core200 and to the back-side end 130A of the disposable pet diaper 100 eachform an erected region for forming an erected section 700 which isdescribed below. Specifically, the region adjacent to the abdomen-sideend 210 of the absorbent core 200, the region adjacent to the back-sideend 220 of the absorbent core 200, and the region adjacent to theback-side end 130A of the disposable pet diaper 100 are referred to asan abdomen-side erected region 171, a crotch-side erected region 173 anda back-side erected region 172, respectively.

Depending on design of the disposable pet diaper 100, part of theabsorbent core 200 may be arranged within the absorbent-corenon-arrangement region 170, especially in any of the erected regions.Specifically, part of tissue paper, pulp fibers or super absorbentpolymer may be disposed in the erected region. Even in such a case, ifthe erected region maintains its flexibility and forms the erectedsection 700, the absorbent-core non-arrangement region 170 is consideredas being substantially formed and the erected region is also consideredas being formed at the same time.

The disposable pet diaper 100 has fastening parts 300 on the both ends150A of the abdomen-side flap 150 in the diaper transverse direction.

As shown in FIG. 3, each of the fastening parts 300 has a fastening partlongitudinal direction 300X and a fastening part transverse direction300Y. In the fastening part longitudinal direction 300X, the fasteningpart 300 has a fixed part 320 in which the fastening part 300 is fixedto the disposable pet diaper 100, and a free part 310 provided to befastened to a fastening region 900.

The fastening part 300 is a fiber nonwoven fabric made of polyolefinthermoplastic synthetic fibers, or a plastic film made of polyolefinthermoplastic synthetic resin. A plurality of hooks (not shown) areprovided on the diaper inside surface 100Z1 of the free part 310. Thehooks are formed of polyolefin thermoplastic synthetic resin. Althoughthe hooks here are provided and configured to be fastened to thefastening region 900, other structures such as an adhesive can beselected for use in place of the hooks, depending on the structure ofthe fastening region 900.

The fastening part 300 is an example embodiment that corresponds to the“fastening part having a prescribed length and provided on theabdomen-side waist area” according to this invention.

The disposable pet diaper 100 has flaps 140A. The flaps 140A include apair of abdomen-side flaps 150 formed on the both ends 100A in thediaper transverse direction in the abdomen-side waist area 110, and apair of back-side flaps 160 formed on the both ends 100A in the diapertransverse direction in the back-side waist area 130. The flaps 140A aredefined by a pair of virtual lines 100Y1 extending in the diaperlongitudinal direction and passing through a pair of minimum widthpoints 100AP on the ends 100A of the disposable pet diaper 100 in thediaper transverse direction between which a line connecting the ends100A in the diaper transverse direction is shortest. Specifically, thevirtual lines 100Y1 are referred to as flap boundary lines, and regionsoutside a pair of the flap boundary lines 100Y1 are referred to as flaps(the abdomen-side flaps 150, the back-side flaps 160), while an insideregion between the flap boundary lines is referred to as a body 140B.

As shown in FIG. 3, in the abdomen-side flap 150, the free end 310 ofthe fastening part 300 protrudes from the end 150A in the diapertransverse direction. A point which bisects the fastening part 300 inthe fastening part transverse direction 300Y on a boundary between theend 150A and the fastening part 300 is referred to as a fastening partmidpoint 300P1.

The back-side end 150B of the abdomen-side flap 150 is arcuately formedand extends contiguously from the end 150A of the abdomen-side flap 150in the diaper transverse direction to the leg-side end 120A.

A preferable structure of the abdomen-side flap 150 is now describedwith reference to FIGS. 4 and 5.

In FIG. 4, a diaper longitudinal center line 100Y2 passes through thecenter of the disposable pet diaper 100 in the diaper transversedirection X. Specifically, the diaper longitudinal center line 100Y2coincides with a line connecting an abdomen-side end center point 110APon the center of the abdomen-side end 110A and a back-side end centerpoint 130AP on the center of the back-side end 130A in the disposablepet diaper 100.

The distance between the abdomen-side end 110A and the back-side end130A on the diaper longitudinal center line 100Y2 is referred to as adiaper longitudinal length D1.

Further, a point which bisects the diaper longitudinal length D1 isreferred to as a diaper center point 100P.

In providing the structure of the abdomen-side flap 150, the inventorfocused on the relation between straight lines connecting the fasteningpart midpoint 300P1 of the fastening part 300 and the diaperlongitudinal center line 100Y2 and the shape of the back-side end 150Bof the abdomen-side flap 150.

Especially, the relation between a shortest straight-line distance 300Lof a straight line passing the back-side end 150B of the abdomen-sideflap 150, among the straight lines connecting the fastening partmidpoint 300P1 of the fastening part 300 and the diaper longitudinalcenter line 100Y2, and a point of intersection of this straight linewith the diaper longitudinal center line 100Y2 or a shortest line point300P2 was focused on.

As a result of keen studies, it was found that the abdomen-side flap 150has a suitable and advantageous structure when the shortest line point300P2 is located on the side of the abdomen-side end 110A of thedisposable pet diaper 100 beyond the diaper center point 100P.

Specifically, the position of the shortest line point 300P2 has a greatinfluence on the shape of the back-side end 150B of the abdomen-sideflap 150. As described above, the back-side end 150B is arcuate andextends from the end 150A of the abdomen-side flap 150 in the diapertransverse direction to the leg-side end 120A of the disposable petdiaper 100.

In this respect, assuming that the shortest line point 300P2 is locatedon the side of the back-side end 130A beyond the diaper center point,the position at which the back-side end 150B of the abdomen-side flap150 meets the leg-side end 120A is located closer to the back-side end130A than that in the present invention. As a result, the area of theabdomen-side flap 150 is increased. Therefore, when the disposable petdiaper 100 is put on the pet, a longer area of the abdomen-side flap 150comes in contact with a leg α1 of the pet.

In the position of the shortest line point 300P2 according to thisinvention, however, as shown in FIG. 5, the area of the abdomen-sideflap 150 can be reduced, and the length with which the abdomen-side flap150 comes in contact with the leg α1 of the pet can be reduced.

The disposable pet diaper 100 is available in various sizescorresponding to pets of various sizes. The pets here are limited tocats and dogs. In this case, when a measured length D2 or a distancebetween the shortest line point 300P2 and the abdomen-side end centerpoint 110AP of the disposable pet diaper 100, is set to 170 to 250 mm,the suitable and advantageous abdomen-side flap 150 can be provided inthe disposable pet diaper 100 of any size.

Further, the relation between the measured length D2 and the diaperlongitudinal length D1 of the disposable pet diaper 100 was alsoconsidered. As a result, it was found that the suitable and advantageousabdomen-side flap 150 can be provided in the disposable pet diaper 100of any size when the ratio of the measured length D2 to the diaperlongitudinal length D1 is 45.5 to 50.0%.

The disposable pet diaper 100 has the fastening region 900 which isremovably fastened to the fastening part 300.

The fastening region 900 is adhered to the outside surface 100Z2 in theback-side waist area 130. The fastening region 900 is formed by a targettape which is a fiber nonwoven fabric made of polyolefin thermoplasticsynthetic fibers, or a plastic film made of polyolefin thermoplasticsynthetic resin, and having a large number of loops (not shown) made ofpolyolefin thermoplastic synthetic resin. Depending on the structure ofthe hooks in the free part 310 of the fastening part 300, it may beconstructed without using the target tape such that the fastening part300 can be directly fastened to the nonwoven fabric forming the diaperoutside surface 100Z2. In this case, the fastening region 900 isprovided and configured as a region to which the fastening part 300 canbe fastened in the nonwoven fabric forming the diaper outside surface100Z2. Further, in the case of the structure in which an adhesive isused in the free part 310 of the fastening part 300, a plastic film isused as the fastening region 900.

The fastening region 900 is an example embodiment that corresponds tothe “fastening region provided in the back-side waist area andconfigured to receive the fastening part” according to this invention.

In the disposable pet diaper 100, a leg stretchable elastic member 400is provided in a prescribed region of the absorbent-core non-arrangementregion 170 between the end 100A in the diaper transverse direction andthe absorbent core 200.

The leg stretchable elastic member 400 is arranged in a stretched state,and when using the disposable pet diaper 100, the leg stretchableelastic member 400 contracts to form leg gathers 410 which are describedbelow.

The leg stretchable elastic member 400 is arranged to extend from aprescribed region of the abdomen-side end 110A to the back-side end 130Aof the disposable pet diaper 100 in the diaper longitudinal direction Y.

Here, “to extend to the back-side end 130A” of the disposable pet diaper100 does not only mean that the leg stretchable elastic member 400continuously extends to the back-side end 130A. Specifically, the legstretchable elastic member 400 may be arranged to extend with a distancefrom the back-side end 130A only if the back-side end 130A is acted uponby the contraction force of the leg stretchable elastic member 400 andthe erected section 700 is formed.

The leg stretchable elastic member 400 is formed of synthetic or naturalrubber thread.

The disposable pet diaper 100 has a waist stretchable elastic member500. The waist stretchable elastic member 500 includes an abdomen-sidewaist stretchable elastic member 510 disposed in the absorbent-corenon-arrangement region 170 between the diaper longitudinal end 110A andthe abdomen-side end 210 of the absorbent core 200, and a back-sidewaist stretchable elastic member 520 disposed in the absorbent-corenon-arrangement region 170 between the diaper longitudinal end 130A andthe back-side end 220 of the absorbent core 200.

The waist stretchable elastic member 500 is an example embodiment thatcorresponds to the “waist stretchable elastic member” according to thisinvention.

The waist stretchable elastic member 500 is arranged in a stretchedstate, and when using the disposable pet diaper 100, the waiststretchable elastic member 500 contracts to form waist gathers 530.

The waist gathers 530 are an example embodiment that corresponds to thestructure that “the waist stretchable elastic member is disposed in astretched state between the absorbent core and each of the ends in thediaper longitudinal direction and forms waist gathers by contracting”according to this invention.

The back-side waist stretchable elastic member 520 and the legstretchable elastic member 400 are arranged to overlap each other. Here,the term “overlap” as used in this embodiment does not only mean thatcomponents which overlap each other are in direct contact with eachother. For example, in the structure in which the back-side waiststretchable elastic member 520 and the leg stretchable elastic member400 overlap each other, they do not need to be in direct contact witheach other only if their contraction forces act upon each other suchthat a contraction force intersecting region 180 is formed.

The waist stretchable elastic member 500 is formed of a urethane foamedsheet material.

Further, the abdomen-side waist stretchable elastic member 510 isoverlapped with the fixed part 320 of the fastening part 300.

At this time, the abdomen-side waist stretchable elastic member 510 isdisposed inward of the fixed part 320 of the fastening part 300 in adirection of the inside surface 100Z1 of the disposable pet diaper 100.As a result, the abdomen-side waist stretchable elastic member 510 canbe pressed against the pet α with the fastening part 300, so that thedisposable pet diaper 100 can better fit around the waist of the pet αand prevent the abdomen-side end 110A from being turned up.

The disposable pet diaper 100 has a leakproof sheet 800.

The leakproof sheet 800 is an example embodiment that corresponds to the“leakproof sheet arranged in the diaper longitudinal direction”according to this invention.

A leakproof sheet stretchable elastic member 600 is disposed in astretched state in the leakproof sheet 800.

The leakproof sheet stretchable elastic member 600 is an exampleembodiment that corresponds to the “leakproof sheet stretchable elasticmember disposed in a stretched state in the leakproof sheet” accordingto this invention.

The leakproof sheet 800 is disposed in a prescribed region extendingfrom each of the ends 100A in the diaper transverse direction of thedisposable pet diaper 100 to the body 140B of the disposable pet diaper100.

The leakproof sheet stretchable elastic member 600 is disposed in aprescribed region in the diaper longitudinal direction Y between theabsorbent core 200 and each of the ends 100A in the diaper transversedirection X. This is an example embodiment that corresponds to thefeature that “the leakproof sheet stretchable elastic member is disposedin a prescribed region in the diaper longitudinal direction between theabsorbent core and each of the ends in the diaper transverse direction”according to this invention.

Further, the arrangement of the leakproof sheet stretchable elasticmember 600 “between the absorbent core 200 and each of the ends 100A inthe diaper transverse direction X” does not mean that the wholeleakproof sheet stretchable elastic member 600 is disposed “between theabsorbent core 200 and each of the ends 100A in the diaper transversedirection X”. Specifically, at least part of the leakproof sheetstretchable elastic member 600 needs to be disposed “between theabsorbent core 200 and each of the ends 100A in the diaper transversedirection X”.

The leakproof sheet stretchable elastic member 600 is disposed within aspace which is created by a folded part 810 of an inner end of theleakproof sheet 800 and extends in the diaper longitudinal direction Y.

As shown in FIG. 6, the leakproof sheet 800 has a fixed part 830 whichis fixed to other components (a liquid-permeable sheet 910, aliquid-resistant sheet 920, an outer sheet 930) of the disposable petdiaper 100 by an adhesive (not shown). In FIG. 6, the fixed part 830 isshown by hatching.

The fixed part 830 is not formed in a region of the leakproof sheet 800which extends in the diaper longitudinal direction Y and overlaps withthe end 230 of the absorbent core 200 in the diaper transverse directionX. This region not having the fixed part 830 is erected by contractionof the leakproof sheet stretchable elastic member 600 and forms aleakproof wall 820 which is described below. Further, leakproof gathers840 are formed in the leakproof sheet 800 by contraction of theleakproof sheet stretchable elastic member 600.

The leakproof gathers 840 are an example embodiment that corresponds tothe “leakproof gathers which are formed by contraction of the leakproofsheet stretchable elastic member” according to this invention.

The leakproof sheet stretchable elastic member 600 does not need to beprovided along the whole length of the region (which forms the leakproofwall 820) not having the fixed part 830 in the diaper longitudinaldirection Y. For example, it is sufficient to provide the leakproofsheet stretchable elastic member 600 only in part of the region of theleakproof wall 820 in the diaper longitudinal direction Y. Specifically,it is sufficient for the contraction force of the leakproof sheetstretchable elastic member 600 to act upon a part of the fixed part 830on the both ends of the region of the leakproof wall 820 in the diaperlongitudinal direction Y. Here, the part of the fixed part 830 on theboth ends of the region of the leakproof wall 820 in the diaperlongitudinal direction Y is referred to as a contraction force fixingpart 610.

The contraction force fixing part 610 includes an abdomen-sidecontraction force fixing part 620 and a back-side contraction forcefixing part 630.

The back-side contraction force fixing part 630 is provided between theback-side end 220 of the absorbent core 200 and the tail insertionopening 190. Specifically, by provision of this structure, theabsorbent-core non-arrangement region 170 between the back-side end 220of the absorbent core 200 and the tail insertion opening 190 is erectedby contraction of the leakproof sheet stretchable elastic member 600 andforms the erected section 700.

Further, an abdomen-side end of the abdomen-side contraction forcefixing part 620 is overlapped with the abdomen-side waist stretchableelastic member 510. An abdomen-side end of the leakproof sheetstretchable elastic member 600 is arranged to extend up to theabdomen-side end of the abdomen-side contraction force fixing part 620.Therefore, the abdomen-side end of the leakproof sheet stretchableelastic member 600 is overlapped with the abdomen-side waist stretchableelastic member 510.

By provision of this structure, as described below, the absorbent-corenon-arrangement region 170 between the abdomen-side end 210 of theabsorbent core 200 and the abdomen-side end 110A of the disposable petdiaper 100 is erected by contraction of the leakproof sheet stretchableelastic member 600 and forms the erected section 700.

The disposable pet diaper 100 includes the liquid-permeable sheet 910,the absorbent core 200, the liquid-resistant sheet 920, the outer sheet930 and the leakproof sheet 800.

As shown in FIGS. 7 to 9, the liquid-permeable sheet 910 is disposed onthe inside surface 100Z1 side of the disposable pet diaper 100. Theabsorbent core 200 is disposed between the liquid-permeable sheet 910and the liquid-resistant sheet 920. The outer sheet 930 is disposed onthe outside surface 100Z2 side of the liquid-resistant sheet 920. Theleakproof sheet 800 is disposed over the liquid-permeable sheet 910, theliquid-resistant sheet 920 and the outer sheet 930 in the diapertransverse direction X. As a result, the abdomen-side flap 150 and theback-side flap 160 are formed by the leakproof sheet 800 and the outersheet 930.

The leg stretchable elastic member 400 is disposed between the leakproofsheet 800 and the liquid-resistant sheet 920.

The leakproof sheet stretchable elastic member 600 is disposed in thespace inside the folded part 810 formed on the end of the leakproofsheet 800.

As shown in FIG. 7, the fastening part 300 is disposed between theleakproof sheet 800 and the outer sheet 930.

As shown in FIGS. 7 and 8, the leakproof sheet 800 not having the fixedpart 830 is erected by contraction of the leakproof sheet stretchableelastic member 600 and forms the leakproof wall 820. At this time, alarge number of creases or the leakproof gathers 840 are formed in theleakproof sheet 800.

As shown in FIG. 9, the fastening region 900 is provided on the outsidesurface 100Z2 of the outer sheet 930.

The waist stretchable elastic member 500, not shown, is disposed betweenthe liquid-permeable sheet 910 and the liquid-resistant sheet 920.

The liquid-permeable sheet 910, the liquid-resistant sheet 920, theouter sheet 930 and the leakproof sheet 800 are formed of nonwovenfabric. The nonwoven fabric can be selected from those manufactured byspun lacing, needle punching, melt blowing, thermal bonding, spunbonding or chemical bonding.

An adhesive, not shown, is used to fix the liquid-permeable sheet 910,the liquid-resistant sheet 920, the outer sheet 930 and the leakproofsheet 800 with each other and to fix the leg stretchable elastic member400, the leakproof sheet stretchable elastic member 600 and the waiststretchable elastic member 500. A hot-melt adhesive is preferably usedas the adhesive, but other adhesives such as acrylic adhesive and rubberadhesive can also be used.

The adhesive is preferably applied in any one of spiral, wave, dot andstripe patterns.

Next, the relation among the contraction forces of the leg stretchableelastic member 400, the leakproof sheet stretchable elastic member 600and the waist stretchable elastic member 500 is described with referenceto FIGS. 10 and 11. In FIGS. 10 and 11, for convenience of explanation,the abdomen-side flaps 150 and the back-side flaps 160 are not shown andonly the body 140B is shown.

As shown in FIG. 10, the leg stretchable elastic member 400 and theleakproof sheet stretchable elastic member 600 contract inward from theends in the diaper longitudinal direction Y. Specifically, contractionforce F1 of the leg stretchable elastic member 400 and the leakproofsheet stretchable elastic member 600 acts inward in the diaperlongitudinal direction Y.

The waist stretchable elastic member 500 contracts inward from the endsin the diaper transverse direction X. Specifically, contraction force F2of the waist stretchable elastic member 500 acts inward in the diapertransverse direction X.

The contraction force intersecting region 180 is a region in which thecontraction force F1 of the leg stretchable elastic member 400 and theleakproof sheet stretchable elastic member 600 and the contraction forceF2 of the waist stretchable elastic member 500 intersect with eachother. Therefore, contraction force F3 of the contraction forceintersecting region 180 acts inward in a direction crossing the diaperlongitudinal direction Y and the diaper transverse direction X.

The contraction force intersecting region 180 includes a firstcontraction force intersecting region 181 formed toward the abdomen-sideend 110A of the disposable pet diaper 100 and a second contraction forceintersecting region 182 formed toward the back-side end 130A.

As a result, as shown in FIG. 11, a first curved part 540 is formed inthe abdomen-side end 110A and the back-side end 130A of the disposablepet diaper 100 and bulges outward in a direction from the inside surface100Z1 to the outside surface 100Z2 of the disposable pet diaper 100 bythe contraction force F2 of the waist stretchable elastic member 500.

The first curved part 540 includes a first abdomen-side curved part 541formed in the abdomen-side end 110A of the disposable pet diaper 100 anda first back-side curved part 542 formed in the back-side end 130A ofthe disposable pet diaper 100.

Further, a second curved part 183 is formed in the contraction forceintersecting region 180 and curved in the direction of the insidesurface 100Z1 of the disposable pet diaper 100 by the contraction forceF3 acting on the contraction force intersecting region 180.

The second curved part 183 includes a second abdomen-side curved part184 formed in the first contraction force intersecting region 181 and asecond back-side curved part 185 formed in the second contraction forceintersecting region 182.

Now, the state in which the leg stretchable elastic member 400 and theleakproof sheet stretchable elastic member 600 are contracted isdescribed with reference to FIG. 12. FIG. 12 is a sectional view takenalong line D-D in FIG. 1, but, for convenience of explanation, part ofthe liquid-permeable sheet 910, the liquid-resistant sheet 920 and theouter sheet 930 and the whole of the absorbent core 200 and thefastening region 900 are not shown.

In FIG. 12, the leg stretchable elastic member 400 and the leakproofsheet stretchable elastic member 600 are contracted. As a result, theerected section 700 is formed by the contraction forces of the legstretchable elastic member 400 and the leakproof sheet stretchableelastic member 600. Specifically, each of the abdomen-side erectedregion 171, the back-side erected region 172 and the crotch-side erectedregion 173 in the absorbent-core non-arrangement region 170 is erectedand forms the erected section 700.

The erected section 700 includes an abdomen-side erected section 710, aback-side erected section 720 and a crotch-side erected section 730.

In this invention, as used herein, the term “erect” to form the erectedsection 700 means that the absorbent-core non-arrangement region 170deforms by the contraction force of one of the stretchable elasticmembers or by a combination of the contraction forces of two or more ofthe stretchable elastic members.

The abdomen-side erected region 171 is erected by contraction of theleakproof sheet stretchable elastic member 600 and forms theabdomen-side erected section 710.

The abdomen-side erected section 710 is an example embodiment thatcorresponds to the feature that “each of the ends in the diaperlongitudinal direction is erected by contraction of the leakproof sheetstretchable elastic member and forms an erected section” according tothis invention.

The back-side erected region 172 is erected by contraction of the legstretchable elastic member 400 and forms the back-side erected section720.

The leakproof sheet stretchable elastic member 600 is overlapped withthe abdomen-side waist stretchable elastic member 510. The legstretchable elastic member 400 is overlapped with the back-side waiststretchable elastic member 520.

The waist stretchable elastic member 500 is arranged having a prescribedlength in the diaper transverse direction. Therefore, the abdomen-sideerected section 710 and the back-side erected section 720 erect theabdomen-side waist stretchable elastic member 510 and the back-sidewaist stretchable elastic member 520, respectively. Thus, theabdomen-side erected region 171 and the back-side erected region 172 areheld in the stable erected state. Specifically, the abdomen-side waiststretchable elastic member 510 and the back-side waist stretchableelastic member 520 are provided as an erection sheet 740 to ensure theerected state of the erected section 700.

The erection sheet 740 is an example embodiment that corresponds to the“erection sheet provided in the absorbent-core non-arrangement region inthe diaper longitudinal direction” according to this invention.

The structure of the erection sheet 740 which is formed by the waiststretchable elastic member 500 is an example embodiment that correspondsto the feature which “the erection sheet comprises a waist stretchableelastic member” according to this invention.

This relation between the leakproof sheet stretchable elastic member 600and the erection sheet 740 is an example embodiment that corresponds tothe feature that “the erection sheet is erected by contraction of theleakproof sheet stretchable elastic member and forms the erectedsection” according to this invention.

When the back-side fixed part 630 of the contraction force fixing part610 is moved by contraction of the leakproof sheet stretchable elasticmember 600, the crotch-side erected region 173 is erected and forms thecrotch-side erected section 730.

Further, as described above, the leakproof wall 820 is formed bycontraction of the leakproof sheet stretchable elastic member 600. Aspace surrounded by the leakproof wall 820, the abdomen-side erectedsection 710, the crotch-side erected section 730 and the absorbent core(not shown in FIG. 12) forms an excrement storage space 850.

The leakproof wall 820 is an example embodiment that corresponds to the“leakproof wall which is formed by contraction of the leakproof sheetstretchable elastic member” according to this invention.

Further, depending on the erected state of the abdomen-side erectedsection 710, the space surrounded by the leakproof wall 820, thecrotch-side erected section 730 and the absorbent core (not shown inFIG. 12) may also be configured as the excrement storage space 850.

A urine absorbent pad can be disposed in the excrement storage space850.

The urine absorbent pad can have a known structure to be provided in adisposable pet diaper.

A third curved part 640 is formed in a region extending from theabdomen-side end 110A to the tail insertion opening 190 in thedisposable pet diaper 100 and bulges in a direction from the insidesurface 100Z1 to the outside surface 100Z2 of the disposable pet diaper100 by the contraction force F1 of the leg stretchable elastic member400 and the leakproof sheet stretchable elastic member 600.

A fourth curved part 420 is formed in a region extending from the tailinsertion opening 190 to the back-side end 130A in the disposable petdiaper 100 and bulges in a direction from the inside surface 100Z1 tothe outside surface 100Z2 of the disposable pet diaper 100 mainly by thecontraction force F1 of the leg stretchable elastic member 400.

Next, putting the disposable pet diaper 100 on a pet is explained withreference to FIGS. 13 to 15. First, a user takes the disposable petdiaper 100 out of a package. In most cases, in the package, theabdomen-side flaps 150 and the back-side flaps 160 of the disposable petdiaper 100 are folded inward, and the disposable pet diaper 100 itselfis folded, for example, into two or three.

When using the disposable pet diaper 100, the user unfolds the foldedstructure. At this time, the leg stretchable elastic member 400, thewaist stretchable elastic member 500 and the leakproof sheet stretchableelastic member 600 contract. As a result, the erected section 700including the abdomen-side erected section 710, the back-side erectedsection 720 and the crotch-side erected section 730 is formed, and theleakproof wall 820 is formed. Further, the first curved part 540, thesecond curved part 183, the third curved part 640 and the fourth curvedpart 420 are formed, and the leg gathers 410, the waist gathers 530 andthe leakproof gathers 840 are formed. The shape of the disposable petdiaper 100 is stabilized by contraction of the leg stretchable elasticmember 400, the waist stretchable elastic member 500 and the leakproofsheet stretchable elastic member 600.

This state of the erected section 700 when using the disposable petdiaper 100 is an example embodiment that corresponds to the feature that“when the disposable pet diaper is ready to be put on the pet, theleakproof sheet stretchable elastic member is already contracted so thatthe erected section is already formed” according to this invention.

Next, the user inserts the tail of the pet α through the tail insertionopening 190 of the disposable pet diaper 100.

Then the user covers the crotch and the abdomen of the pet α with thecrotch area 120 and the abdomen-side waist area 110, while the back-sidewaist area 130 is closely fitted to the back of the pet α. Then the freeend 310 of the fastening part 300 is fastened to the fastening region900. Thus, the disposable pet diaper 100 is put on the pet α.

These matters related to putting the disposable pet diaper 100 on thepet α is an example embodiment that corresponds to the feature that“when the disposable diaper is put on the pet, the crotch area and theabdomen-side waist area cover a crotch and an abdomen of the pet, whilethe back-side waist area is closely fitted to a back of the pet, and thefastening part is fastened to the fastening region” according to thisinvention.

The state of the disposable pet diaper 100 in fitting the back-sidewaist area 130 to the back of the pet α is explained with reference toFIG. 13.

The first curved part 540 bulging outward in the direction of the diaperoutside surface 100Z2 is already formed in the back-side end 130A.Further, a region extending from the back-side end 130A to the tailinsertion opening 190 is maintained in a stable shape by the fourthcurved part 420. The back-side flap 160 is curved in the direction ofthe inside surface 100Z1 of the disposable pet diaper 100 together withthe second contraction force intersecting region 182 by the secondcurved part 183.

Thus, the user can easily place the back-side end 130A along a curve ofthe back of the pet α.

Further, the back-side end 130A has a low possibility of being turnedup.

The state of the disposable pet diaper 100 in covering the crotch andthe abdomen of the pet α with the crotch area 120 and the abdomen-sidewaist area 110 and fastening the free end 310 of the fastening part 300to the fastening region 900, is explained with reference to FIG. 14.

The first curved part 540 bulging in the direction of the diaper outsidesurface 100Z2 is already formed in the abdomen-side end 110A. Further, aregion extending from the abdomen-side end 110A to the tail insertionopening 190 is maintained in a stable shape by the third curved part640.

The abdomen-side flap 150 is curved together with the first contractionforce intersecting region 181 in the direction of the inside surface100Z1 of the disposable pet diaper 100 by the second curved part 183. Inthe abdomen-side flap 150 having the fastening part 300, the transverseend 150A is heavier than a boundary part of the abdomen-side flap 150with the body 140B. Therefore, the boundary part of the abdomen-sideflap 150 with the body 140B is curved in the direction of the insidesurface 100Z1 together with the second curved part 183, while thetransverse end 150A of the abdomen-side flap 150 is curved in thedirection of the outside surface 100Z2 by its own weight. As a result,the fastening part 300 is supported on the abdomen-side flap 150 withouthanging straight down.

Thus, the user can easily set the abdomen-side end 110A onto a curve ofthe abdomen of the pet α.

Further, the abdomen-side end 110A has a low possibility of being turnedup.

Further, the user can easily grab the fastening part 300.

Furthermore, when the user moves the fastening part 300 toward thefastening region 900, the fastening part 300 receives the influence ofthe first contraction force intersecting region 181. Therefore, whereverthe user moves the fastening part 300, the contraction force acts uponthe fastening part 300. As a result, the user can easily move thefastening part 300 onto a desired position of the fastening region 900.

With the structure in which the fixed part 320 of the fastening part 300is overlapped with the abdomen-side waist stretchable elastic member510, especially the abdomen-side end 110A of the disposable pet diaper100 can be closely fitted to the back of the pet α over a relativelylong distance. Thus, a gap is hardly formed between the disposable petdiaper 100 and the pet α, so that leakage can be prevented.

Further, when operating the free part 310 of the fastening part 300, theuser can directly expand and contract the abdomen-side waist stretchableelastic member 510. At this time, the state of expansion and contractionof the abdomen-side waist stretchable elastic member 510 is directlyconveyed to user's finger tips. Therefore, the disposable pet diaper 100can be provided with improved user-friendliness.

FIG. 15 is a drawing for illustrating the state of the disposable petdiaper 100 worn by the pet α.

Even after the disposable pet diaper 100 has been put on the pet, theleg stretchable elastic member 400, the waist stretchable elastic member500 and the leakproof sheet stretchable elastic member 600 aremaintained in the contracted state. Therefore, the erected section 700including the abdomen-side erected section 710, the back-side erectedsection 720 and the crotch-side erected section 730 is maintained in theerected state. The leakproof wall 820 is also maintained. Further, thefirst curved part 540, the second curved part 183, the third curved part640 and the fourth curved part 420 are maintained in the curved state.The leg gathers 410, the waist gathers 530 and the leakproof gathers 840are maintained.

The feature that the erected section 700 is kept in the erected statewhile the disposable pet diaper 100 is worn by the pet is an exampleembodiment that corresponds to the feature that “while the disposablediaper is worn by the pet, the leakproof sheet stretchable elasticmember is maintained in a contracted state so that the erected sectionis maintained in an erected state” according to this invention.

When the pet α excretes, excrement is held within the excrement storagespace 850. When the excrement is urine, it is absorbed by the absorbentcore 200. When the excrement is feces, part of feces is absorbed by theabsorbent core 200 and the rest is held within the excrement storagespace 850.

Whether the excrement is urine or feces, the weight of the absorbentcore 200 is received in the fastening part longitudinal direction 300Xin the free part 310 of the fastening part 300.

This is an example embodiment that corresponds to the feature that “theweight of the absorbent core after excretion is received in thelongitudinal direction of the fastening part while the disposable diaperis worn by the pet” according to this invention.

In order to remove the disposable pet diaper 100 from the pet α, thefastening part 300 is detached from the fastening region 900, and thenthe disposable pet diaper 100 is pulled off through the tail insertionopening 190 and disposed of.

In the process of detaching the fastening part 300 from the fasteningregion 900 and pulling off the disposable pet diaper 100 through thetail insertion opening 190, the abdomen-side end 110A is turnedobliquely downward from the pet α. Even at this time, the risk offalling of feces can be reduced by the abdomen-side erected section 710.

Second to sixth embodiments of the present invention are now describedwith reference to FIGS. 16 to 20. In the description of the second tosixth embodiments, components which are identical to those in the firstembodiment are not described in detail and their reference numerals areomitted.

Second Embodiment

The second embodiment of the present invention is explained withreference to FIG. 16. A disposable pet diaper 101 according to thesecond embodiment is different from the disposable pet diaper 100 of thefirst embodiment in that a leg stretchable elastic member is notprovided, and a leakproof sheet stretchable elastic member 601 isarranged to extend from the abdomen-side end to the back-side end of thedisposable pet diaper 101. The abdomen-side fixed part and the back-sidefixed part are formed on the abdomen-side end and the back-side end ofthe disposable pet diaper 101, respectively, in the fixed part of theleakproof sheet. The leakproof sheet stretchable elastic member 601 isoverlapped with the abdomen-side waist stretchable elastic member andthe back-side waist stretchable elastic member of the waist stretchableelastic member.

A comparison is made between the disposable pet diaper 100 of the firstembodiment and the disposable pet diaper 101 of the second embodiment.In the disposable pet diaper 101 of the second embodiment, the erectedsection 700 including the abdomen-side erected section 710 and theback-side erected section 720, the leakproof wall 820, the leakproofgathers 840, the third curved part 640 and the fourth curved part 420are formed by the action of the leakproof sheet stretchable elasticmember 601.

The first abdomen-side curved part 541 and the first back-side curvedpart 542 are formed by the action of the waist stretchable elasticmember, or by the actions of the abdomen-side waist stretchable elasticmember and the back-side waist stretchable elastic member, respectively.

The first contraction force intersecting region 181 is formed by thecontraction force of the leakproof sheet stretchable elastic member 601and the contraction force of the abdomen-side waist stretchable elasticmember. As a result, the second abdomen-side curved part 184 is formed.

Further, the second contraction force intersecting region 182 is formedby the contraction force of the leakproof sheet stretchable elasticmember 601 and the contraction force of the back-side waist stretchableelastic member. As a result, the second back-side curved part 185 isformed.

Specifically, in the disposable pet diaper 101 of the second embodiment,unlike in the disposable pet diaper 100 of the first embodiment, thecrotch-side erected section 730 and the leg gathers 410 are not formed.

Therefore, the disposable pet diaper 101 of the second embodiment hasall of the effects of the disposable pet diaper 100 of the firstembodiment other than those exhibited by the leg gathers 410 and thecrotch-side erected section 730.

Furthermore, in the disposable pet diaper 101 of the second embodiment,due to the absence of the leg stretchable elastic member, the ends ofthe disposable pet diaper 101 in the diaper transverse direction can belocated closer to the absorbent core. As a result, a portion of thedisposable pet diaper 101 which comes in contact with the pet's legs canbe further reduced.

Further, due to the absence of a sheet forming a portion around legs,the disposable pet diaper when worn can be made neat around legs.

Third Embodiment

The third embodiment of the present invention is explained withreference to FIG. 17. A disposable pet diaper 102 according to the thirdembodiment is different from the disposable pet diaper 100 of the firstembodiment in that a leg stretchable elastic member 401 is not providedin the abdomen-side waist area and the back-side waist area. Further,the contraction force of the leakproof sheet stretchable elastic memberexerts no influence on the abdomen-side end of the disposable pet diaper102.

A comparison is made between the disposable pet diaper 100 of the firstembodiment and the disposable pet diaper 102 of the third embodiment. Inthe disposable pet diaper 102 of the third embodiment, the leg gathers410 are formed only in a region of the leg stretchable elastic member401. Further, the abdomen-side erected section 710 and the back-sideerected section 720 of the erected section 700 are not formed. Thesecond abdomen-side curved part 184 and the second back-side curved part185 of the second curved part 183 are not formed. The fourth curved part420 is formed only in the region of the leg stretchable elastic member401.

In this structure, the erected section 700 including the crotch-sideerected section 730 is formed, and the leakproof wall 820 is formed.Further, the first curved part 540 including the first abdomen-sidecurved part 541 and the first back-side curved part 542, the thirdcurved part 640 and part of the fourth curved part 420 are formed. Partof the leg gathers 410 and the leakproof gathers 840 are formed.

Therefore, the disposable pet diaper 102 according to the thirdembodiment has those of the effects of the disposable pet diaper 100 ofthe first embodiment which are exhibited by the crotch-side erectedsection 730, the leakproof wall 820, the first abdomen-side curved part541, the first back-side curved part 542, the third curved part 640,part of the fourth curved part 420, part of the leg gathers 410 and theleakproof gathers 840.

Furthermore, by arrangement of the abdomen-side waist stretchableelastic member 511 overlapped with the fastening parts 301, when theabdomen-side waist area is set on the abdomen of the pet in order to putthe disposable pet diaper 102 on the pet, the fastening parts 301 arecurved inside the disposable pet diaper under the influence of thecontraction force of the abdomen-side waist stretchable elastic member511. Thus, it is made easier for the user to grab the fastening parts301.

Fourth Embodiment

The fourth embodiment of the present invention is explained withreference to FIG. 18. A disposable pet diaper 103 according to thefourth embodiment is different from the disposable pet diaper 100 of thefirst embodiment in that a leg stretchable elastic member 402 is notprovided in the abdomen-side waist area and the back-side waist area ofthe disposable pet diaper 103. Further, a leakproof sheet stretchableelastic member 603 is arranged to extend from the abdomen-side end tothe back-side end of the disposable pet diaper 103. The abdomen-sidefixed part and the back-side fixed part are formed on the abdomen-sideend and the back-side end of the disposable pet diaper 103,respectively, in the fixed part of the leakproof sheet. The leakproofsheet stretchable elastic member 603 is overlapped with an abdomen-sidewaist stretchable elastic member 512 and the back-side waist stretchableelastic member of the waist stretchable elastic member. The abdomen-sidewaist stretchable elastic member 512 is overlapped with the fasteningparts 302.

A comparison is made between the disposable pet diaper 100 of the firstembodiment and the disposable pet diaper 103 of the fourth embodiment.In the disposable pet diaper 103 of the fourth embodiment, the erectedsection 700 including the abdomen-side erected section 710 and theback-side erected section 720, the leakproof wall 820, the leakproofgathers 840, the third curved part 640 and the fourth curved part 420are formed by the action of the leakproof sheet stretchable elasticmember 603.

The first abdomen-side curved part 541 and the first back-side curvedpart 542 are formed by the action of the waist stretchable elasticmember, or by the actions of the abdomen-side waist stretchable elasticmember 512 and the back-side waist stretchable elastic member,respectively.

The first contraction force intersecting region 181 is formed by thecontraction force of the leakproof sheet stretchable elastic member 603and the contraction force of the abdomen-side waist stretchable elasticmember. As a result, the second abdomen-side curved part 184 is formed.

Further, the second contraction force intersecting region 182 is formedby the contraction force of the leakproof sheet stretchable elasticmember 603 and the contraction force of the back-side waist stretchableelastic member. As a result, the second back-side curved part 185 isformed.

Specifically, in the disposable pet diaper 103 of the fourth embodiment,unlike in the disposable pet diaper 100 of the first embodiment, thecrotch-side erected section 730 and part of the leg gathers 410 are notformed.

Therefore, the disposable pet diaper 103 of the fourth embodiment hasall of the effects of the disposable pet diaper 100 of the firstembodiment other than those exhibited by the whole leg gathers 410 andthe crotch-side erected section 730.

Furthermore, due to the absence of the waist stretchable elastic memberin the abdomen-side region and the back-side region, the abdomen-sideregion and the back-side region can be fitted around the waist of thepet while the fastening member is engaged.

Further, a pocket can be formed in both end regions of the absorbentcore in the diaper longitudinal direction.

Furthermore, by provision of the abdomen-side waist stretchable elasticmember 512 overlapped with the fastening parts 302, when theabdomen-side waist area is set on the abdomen of the pet in order to putthe disposable pet diaper 103 on the pet, the fastening parts 302 arecurved inside the disposable pet diaper under the influence of thecontraction force of the abdomen-side waist stretchable elastic member512. Thus, it is made easier for the user to grab the fastening parts302.

Fifth Embodiment

The fifth embodiment of the present invention is explained withreference to FIG. 19. A disposable pet diaper 104 according to the fifthembodiment is different from the disposable pet diaper 100 of the firstembodiment in that a leakproof sheet stretchable elastic member 604 isarranged to extend from the abdomen-side end to the back-side end of thedisposable pet diaper 104. The abdomen-side fixed part and the back-sidefixed part are formed on the abdomen-side end and the back-side end ofthe disposable pet diaper 104, respectively, in the fixed part of theleakproof sheet. Further, the leakproof sheet stretchable elastic member604 is overlapped with an abdomen-side waist stretchable elastic member513 and the back-side waist stretchable elastic member of the waiststretchable elastic member. Further, the abdomen-side waist stretchableelastic member 513 is overlapped with fastening parts 303.

A comparison is made between the disposable pet diaper 100 of the firstembodiment and the disposable pet diaper 104 of the fifth embodiment. Inthe disposable pet diaper 104 of the fifth embodiment, the erectedsection 700 including the abdomen-side erected section 710 and theback-side erected section 720, the leg gathers 410, the leakproof wall820, the leakproof gathers 840, the third curved part 640 and the fourthcurved part 420 are formed by the actions of a leg stretchable elasticmember 403 and the leakproof sheet stretchable elastic member 604.

The first abdomen-side curved part 541 and the first back-side curvedpart 542 are formed by the action of the waist stretchable elasticmember, or by the actions of the abdomen-side waist stretchable elasticmember 513 and the back-side waist stretchable elastic member,respectively.

Two structures of the first contraction force intersecting regions 181are formed. One is formed by intersection of the contraction forces ofthe leg stretchable elastic member 403 and the abdomen-side waiststretchable elastic member 513, and the other is formed by thecontraction force of the leakproof sheet stretchable elastic member 604and the contraction force of the abdomen-side waist stretchable elasticmember 513. Accordingly, two structures of the second abdomen-sidecurved parts 184 are formed by formation of the two first contractionforce intersecting regions 181.

Similarly, two structures of the second contraction force intersectingregions 182 are formed. One is formed by intersection of the contractionforces of the leg stretchable elastic member 403 and the back-side waiststretchable elastic member, and the other is formed by the contractionforce of the leakproof sheet stretchable elastic member 604 and thecontraction force of the back-side waist stretchable elastic member.Accordingly, two structures of the second back-side curved parts 185 areformed by formation of the two second contraction force intersectingregions 182.

Specifically, unlike in the disposable pet diaper 100 of the firstembodiment, the crotch-side erected section 730 is not formed in thedisposable pet diaper 104 of the fifth embodiment.

Therefore, the disposable pet diaper 104 of the fifth embodiment has allof the effects of the disposable pet diaper 100 of the first embodimentother than those exhibited by the crotch-side erected section 730.

Furthermore, by provision of the abdomen-side waist stretchable elasticmember 513 overlapped with the fastening parts 303, when theabdomen-side waist area is set on the abdomen of the pet in order to putthe disposable pet diaper 104 on the pet, the fastening parts 303 arecurved inside the disposable pet diaper under the influence of thecontraction force of the abdomen-side waist stretchable elastic member513. Thus, it is made easier for the user to grab the fastening parts303.

Further, the contraction forces act over the whole diaper in the diaperlongitudinal direction, so that leakage of excrement can be prevented.Therefore, this disposable pet diaper is particularly suitable forbedridden pets.

Sixth Embodiment

The sixth embodiment of the present invention is explained withreference to FIG. 20. A disposable pet diaper 105 according to the sixthembodiment is different from the disposable pet diaper 100 of the firstembodiment in that a leg stretchable elastic member 404 is not providedin the back-side waist area. Further, a leakproof sheet stretchableelastic member 605 is arranged to extend up to the abdomen-side end ofthe disposable pet diaper 105. The abdomen-side fixed part is formed onthe abdomen-side end of the disposable pet diaper 105 in the fixed partof the leakproof sheet. The leakproof sheet stretchable elastic member605 is overlapped with an abdomen-side waist stretchable elastic member514 of the waist stretchable elastic member. Further, the abdomen-sidewaist stretchable elastic member 514 is overlapped with fastening parts304.

A comparison is made between the disposable pet diaper 100 of the firstembodiment and the disposable pet diaper 105 of the sixth embodiment. Inthe disposable pet diaper 105 of the sixth embodiment, the erectedsection 700 including the abdomen-side erected section 710 and thecrotch-side erected section 730, part of the leg gathers 410, theleakproof wall 820, the leakproof gathers 840, the third curved part 640and part of the fourth curved part 420 are formed by the actions of theleg stretchable elastic member 404 and the leakproof sheet stretchableelastic member 605.

The first abdomen-side curved part 541 is formed by the action of thewaist stretchable elastic member or the abdomen-side waist stretchableelastic member 514.

Two structures of the first contraction force intersecting regions 181are formed. One is formed by intersection of the contraction forces ofthe leg stretchable elastic member 404 and the abdomen-side waiststretchable elastic member 514, and the other is formed by thecontraction force of the leakproof sheet stretchable elastic member 605and the contraction force of the abdomen-side waist stretchable elasticmember 514. Accordingly, two structures of the second abdomen-sidecurved parts 184 are formed by formation of the two first contractionforce intersecting regions 181.

Specifically, unlike in the disposable pet diaper 100 of the firstembodiment, the back-side erected section 720, part of the leg gathers410, the first back-side curved part 542, the second back-side curvedpart 185 and part of the fourth curved part 420 are not formed in thedisposable pet diaper 105 of the sixth embodiment.

Therefore, the disposable pet diaper 105 of the sixth embodiment has allof the effects of the disposable pet diaper 100 of the first embodimentother than those exhibited by the back-side erected section 720, thewhole leg gathers 410, the first back-side curved part 542, the secondback-side curved part 185 and the whole fourth curved part 420.

In this structure, the contraction forces strongly act only on theabdomen-side region, so that a pocket can be readily formed in anabdomen-side region of the absorbent core. Therefore, this disposablepet diaper is suitable as a disposable diaper for male pets.

Furthermore, by provision of the abdomen-side waist stretchable elasticmember 514 overlapped with the fastening parts 304, when theabdomen-side waist area is set on the abdomen of the pet in order to putthe disposable pet diaper 105 on the pet, the fastening parts 304 arecurved inside the disposable pet diaper under the influence of thecontraction force of the abdomen-side waist stretchable elastic member514. Thus, it is made easier for the user to grab the fastening parts304.

The structures or features of the disposable pet diaper according tothis invention are not limited to those described above. The structuresor features of the first to sixth embodiments can be appropriately usedin combination.

Correspondences Between the Features of the Embodiments and the Featuresof the Invention

The disposable pet diaper 100, 101, 102, 103, 104, 105 is an exampleembodiment that corresponds to the “disposable diaper for pets”according to this invention. The back-side waist area 130 is an exampleembodiment that corresponds to the “back-side waist area” according tothis invention. The abdomen-side waist area 110 is an example embodimentthat corresponds to the “abdomen-side waist area” according to thisinvention. The crotch area 120 is an example embodiment that correspondsto the “crotch area” according to this invention. The diaperlongitudinal direction Y and the diaper transverse direction X areexample embodiments that correspond to the “diaper longitudinaldirection” and the “diaper transverse direction”, respectively,according to this invention. The ends 110A and 130A are an exampleembodiment that corresponds to the “both ends in the diaper longitudinaldirection” according to this invention. The ends 100A are an exampleembodiment that corresponds to the “both ends in the diaper transversedirection” according to this invention. The tail insertion opening 190is an example embodiment that corresponds to the “tail insertionopening” according to this invention. The absorbent core 200 is anexample embodiment that corresponds to the “absorbent core” according tothis invention. The absorbent-core non-arrangement region 170 is anexample embodiment that corresponds to the “absorbent-corenon-arrangement region” according to this invention. The fastening part300, 301, 302, 303, 304 is an example embodiment that corresponds to the“fastening part” according to this invention. The fastening region 900is an example embodiment that corresponds to the “fastening region”according to this invention. The leakproof sheet 800 is an exampleembodiment that corresponds to the “leakproof sheet” according to thisinvention. The leakproof sheet stretchable elastic member 600, 601, 602,603, 604, 605 is an example embodiment that corresponds to the“leakproof sheet stretchable elastic member” according to thisinvention. The leakproof gathers 840 are an example embodiment thatcorresponds to the “leakproof gathers” according to this invention. Theleakproof wall 820 is an example embodiment that corresponds to the“leakproof wall” according to this invention. The erected section 700 isan example embodiment that corresponds to the “erected section”according to this invention. The abdomen-side erected section 710 is anexample embodiment that corresponds to the “first erected section”according to this invention. The back-side erected section 720 is anexample embodiment that corresponds to the “second erected section”according to this invention. The erection sheet 740 is an exampleembodiment that corresponds to the “erection sheet” according to thisinvention. The waist stretchable elastic member 500 is an exampleembodiment that corresponds to the “waist stretchable elastic member”according to this invention. The waist gathers 530 are an exampleembodiment that corresponds to the “waist gathers” according to thisinvention. The contraction force fixing part 610 is an exampleembodiment that corresponds to the “fixed part” according to thisinvention. The crotch-side erected section 730 is an example embodimentthat corresponds to the “third erected section” according to thisinvention. The excrement storage space 850 is an example embodiment thatcorresponds to the “excrement storage space” according to thisinvention. The contraction force intersecting region 180 is an exampleembodiment that corresponds to the “contraction force intersectingregion” according to this invention. The first contraction forceintersecting region 181 is an example embodiment that corresponds to the“first contraction force intersecting region” according to thisinvention. The second contraction force intersecting region 182 is anexample embodiment that corresponds to the “second contraction forceintersecting region” according to this invention. The first curved part540 is an example embodiment that corresponds to the “first curved part”according to this invention. The second curved part 183 is an exampleembodiment that corresponds to the “second curved part” according tothis invention.

In view of the nature of the above-described invention, various featurescan be provided as follows.

(Aspect 1)

A disposable diaper for pets, comprising:

an abdomen-side waist area, a back-side waist area, and a crotch areabetween the abdomen-side waist area and the back-side waist area,

a diaper longitudinal direction in which the abdomen-side waist area,the crotch area and the back-side waist area contiguously extend whenthe disposable diaper is not worn by a pet, and a diaper transversedirection crossing the diaper longitudinal direction,

both ends in the diaper longitudinal direction, and both ends in thediaper transverse direction,

a tail insertion opening formed in a prescribed region in the diaperlongitudinal direction,

an absorbent core formed on one side of the tail insertion opening inthe diaper longitudinal direction and disposed in a prescribed regionextending over the crotch area and the abdomen-side waist area,

an absorbent-core non-arrangement region in which the absorbent core isnot disposed,

a fastening part having a prescribed length and provided on theabdomen-side waist area,

a fastening region provided in the back-side waist area and configuredto receive the fastening part,

a leakproof sheet arranged in the diaper longitudinal direction, and

a leakproof sheet stretchable elastic member disposed in a stretchedstate in the leakproof sheet, wherein:

when the disposable diaper is put on the pet, the crotch area and theabdomen-side waist area cover a crotch and an abdomen of the pet, whilethe back-side waist area is closely fitted to a back of the pet, and thefastening part is fastened to the fastening region,

the weight of the absorbent core after excretion is received in thelongitudinal direction of the fastening part while the disposable diaperis worn by the pet,

the leakproof sheet stretchable elastic member is disposed in aprescribed region in the diaper longitudinal direction between theabsorbent core and each of the ends in the diaper transverse direction,and

each of the ends in the diaper longitudinal direction is erected bycontraction of the leakproof sheet stretchable elastic member and formsan erected section.

(Aspect 2)

The disposable diaper as defined in aspect 1, wherein leakproof gathersare formed by contraction of the leakproof sheet stretchable elasticmember.

(Aspect 3)

The disposable diaper as defined in aspect 1 or 2, wherein a leakproofwall is formed by contraction of the leakproof sheet stretchable elasticmember.

(Aspect 4)

The disposable diaper as defined in any one of aspects 1 to 3, whereinthe erected section comprises a first erected section formed on the endin the diaper longitudinal direction in the abdomen-side waist area.

(Aspect 5)

The disposable diaper as defined in any one of aspects 1 to 3, whereinthe erected section comprises a second erected section formed on the endin the diaper longitudinal direction in the back-side waist area.

(Aspect 6)

The disposable diaper as defined in any one of aspects 1 to 3, whereinthe erected section comprises a first erected section formed on the endin the diaper longitudinal direction in the abdomen-side waist area anda second erected section formed on the end in the diaper longitudinaldirection in the back-side waist area.

(Aspect 7)

The disposable diaper as defined in any one of aspects 1 to 6, whereinan erection sheet is provided in an end region of the absorbent-corenon-arrangement region in the diaper longitudinal direction, and theerection sheet is erected by contraction of the leakproof sheetstretchable elastic member and forms the erected section.

(Aspect 8)

The disposable diaper as defined in aspect 7, wherein the erection sheetcomprises a waist stretchable elastic member.

(Aspect 9)

The disposable diaper as defined in aspect 8, wherein the waiststretchable elastic member is disposed in a stretched state between theabsorbent core and each of the ends in the diaper longitudinal directionand forms waist gathers by contracting.

(Aspect 10)

The disposable diaper as defined in any one of aspects 1 to 9, wherein,when the disposable diaper is ready to be put on the pet, the leakproofsheet stretchable elastic member is already contracted so that theerected section is already formed.

(Aspect 11)

The disposable diaper as defined in any one of aspects 1 to 10, wherein,while the disposable diaper is worn by the pet, the leakproof sheetstretchable elastic member is maintained in a contracted state so thatthe erected section is maintained in an erected state.

(Aspect 12)

The disposable diaper as defined in any one of aspects 1 to 11,comprising a fixing part for fixing contraction force of the leakproofsheet stretchable elastic member onto the absorbent-core non-arrangementregion, wherein the absorbent-core non-arrangement region between thefixed part and the leakproof sheet stretchable elastic member is erectedand forms the erected section.

(Aspect 13)

The disposable diaper as defined in any one of aspects 1 to 12, whereinthe absorbent-core non-arrangement region in the crotch area between thefixed part and the absorbent core is erected by contraction of theleakproof sheet stretchable elastic member and forms a third erectedsection.

(Aspect 14)

The disposable diaper as defined in aspect 13, wherein an excrementstorage space surrounded by the leakproof wall, the third erectedsection and the absorbent core is formed.

(Aspect 15)

The disposable diaper as defined in aspect 13, wherein an excrementstorage space surrounded by the leakproof wall, the first erectedsection, the third erected section and the absorbent core is formed.

(Aspect 16)

The disposable diaper as defined in aspect 14 or 15, wherein a urineabsorbent pad is disposed in the excrement storage space.

(Aspect 17)

The disposable diaper as defined in any one of aspects 13 to 16, whereinthe third erected section is formed between the end of the absorbentcore in the diaper longitudinal direction and the tail insertion openingin the crotch area.

(Aspect 18)

The disposable diaper as defined in any one of aspects 13 to 17,wherein, when the disposable diaper is ready to be put on the pet, theleakproof sheet stretchable elastic member is already contracted so thatthe third erected section is already formed.

(Aspect 19)

The disposable diaper as defined in any one of aspects 12 to 18,wherein, while the disposable diaper is worn by the pet, the leakproofsheet stretchable elastic member is maintained in a contracted state sothat the third erected section is maintained in an erected state.

(Aspect 20)

The disposable diaper as defined in any one of aspects 1 to 19,comprising a contraction force intersecting region in which thecontraction force of the leakproof sheet stretchable elastic member andthe contraction force of the waist stretchable elastic member intersectwith each other.

(Aspect 21)

The disposable diaper as defined in aspect 20, wherein the leakproofsheet stretchable elastic member is overlapped with the waiststretchable elastic member.

(Aspect 22)

The disposable diaper as defined in aspect 20, wherein a first curvedpart is formed in the ends in the diaper longitudinal direction andcurved outward when the disposable diaper is put on the pet, and asecond curved part is formed in the contraction force intersectingregion and curved inward when the disposable diaper is put on the pet.

(Aspect 23)

The disposable diaper as defined in any one of aspects 20 to 22, whereinthe contraction force intersecting region is formed in the abdomen-sidewaist area.

(Aspect 24)

The disposable diaper as defined in any one of aspects 20 to 22, whereinthe contraction force intersecting region is formed in the back-sidewaist area.

(Aspect 25)

The disposable diaper as defined in any one of aspects 20 to 22, whereinthe contraction force intersecting region includes a first contractionforce intersecting region formed in the abdomen-side waist area and asecond contraction force intersecting region formed in the back-sidewaist area.

(Aspect 26)

The disposable diaper as defined in any one of aspects 20 to 25,wherein, when the disposable diaper is ready to be put on the pet, theleakproof sheet stretchable elastic member and the waist stretchableelastic member are already contracted so that the contraction forceintersecting region is already formed.

(Aspect 27)

The disposable diaper as defined in any one of aspects 20 to 26,wherein, while the disposable diaper is worn by the pet, the leakproofsheet stretchable elastic member and the waist stretchable elasticmember are maintained in a contracted state so that the contractionforce intersecting region is maintained.

DESCRIPTION OF THE NUMERALS

-   100, 101, 102, 103, 104, 105, 1000 disposable pet diaper-   100A end in the diaper transverse direction-   100P diaper center point-   100Y1 flap boundary line-   100Y2 diaper longitudinal center line-   100Z1 inside surface-   100Z2 outside surface-   110, 1110 abdomen-side waist area-   110A, 1110A abdomen-side end-   110AP abdomen-side end center point-   120, 1120 crotch area-   120A leg-side end-   130, 1130 back-side waist area-   130A, 1130A back-side end-   130AP back-side end center point-   140A flap-   140B body-   150, 1150 abdomen-side flap-   150A end in the diaper transverse direction-   150B, 1150B back-side end-   160, 1160 back-side flap-   170 absorbent-core non-arrangement region-   171 abdomen-side erected region-   172 back-side erected region-   173 crotch-side erected region-   180 contraction force intersecting region-   181 first contraction force intersecting region-   182 second contraction force intersecting region-   183 second curved part-   184 second abdomen-side curved part-   185 second back-side curved part-   190, 1190 tail insertion opening-   191 cut-   200, 2000 absorbent core-   210 abdomen-side end-   220 back-side end-   230 end in the diaper transverse direction-   300, 301, 302, 303, 304, 3000 fastening part-   310 free part-   320 fixed part-   300P1 fastening part midpoint-   300P2 shortest line point-   300L shortest straight-line distance-   300X fastening part longitudinal direction-   300Y fastening part transverse direction-   400, 401, 402, 403, 404 leg stretchable elastic member-   410, 4410 leg gather-   420 fourth curved part-   500 waist stretchable elastic member-   510, 511, 512, 513, 514 abdomen-side waist stretchable elastic    member-   520 back-side waist stretchable elastic member-   530 waist gather-   540 first curved part-   541 first abdomen-side curved part-   542 first back-side curved part-   600, 601, 602, 603, 604, 605, 6000 leakproof sheet stretchable    elastic member-   610 contraction force fixing part-   620 abdomen-side contraction force fixing part-   630 back-side contraction force fixing part-   640 third curved part-   700 erected section-   710 abdomen-side erected section-   720 back-side erected section-   730 crotch-side erected section-   740 erection sheet-   800, 8000 leakproof sheet-   810 folded part-   820 leakproof wall-   830 leakproof sheet fixed part-   840 leakproof gather-   850 excrement storage space-   900, 9000 fastening region-   910 liquid-permeable sheet-   920 liquid-resistant sheet-   930 outer sheet-   D1 diaper longitudinal length-   D2 measured length-   F1 contraction force of the leg stretchable elastic member or    leakproof sheet stretchable elastic member-   F2 contraction force of the waist stretchable elastic member-   F3 contraction force acting on the contraction force intersecting    region-   X diaper transverse direction-   Y diaper longitudinal direction-   α pet-   α1 leg of pet-   α2 back of pet-   α3 abdomen of pet

The invention claimed is:
 1. A disposable diaper for pets, saiddisposable diaper comprising: an abdomen-side waist area, a back-sidewaist area, and a crotch area between the abdomen-side waist area andthe back-side waist area, a diaper longitudinal direction in which theabdomen-side waist area, the crotch area and the back-side waist areacontiguously extend when the disposable diaper is not worn on a pet, anda diaper transverse direction crossing the diaper longitudinaldirection, two longitudinal ends opposing each other in the diaperlongitudinal direction, and two lateral ends opposing each other in thediaper transverse direction, a tail insertion opening in a prescribedregion in the diaper longitudinal direction, an absorbent core on oneside of the tail insertion opening in the diaper longitudinal directionand extending over the crotch area and the abdomen-side waist area, anabsorbent-core non-arrangement region in which the absorbent core is notdisposed, a fastening part having a prescribed length and provided onthe abdomen-side waist area, a fastening region provided in theback-side waist area and configured to receive the fastening part, awaist stretchable elastic member disposed in a stretched state betweenthe absorbent core and each of the two longitudinal ends, a leakproofsheet extending in the diaper longitudinal direction, and a leakproofsheet stretchable elastic member disposed in a stretched state in theleakproof sheet, wherein when the disposable diaper is worn on the pet,the crotch area and the abdomen-side waist area are adapted to cover acrotch and an abdomen of the pet, respectively, the back-side waist areais adapted to be fitted to a back of the pet, and the fastening part isfastened to the fastening region, the weight of the absorbent core afterexcretion is received in the longitudinal direction of the fasteningpart while the disposable diaper is worn on the pet, the leakproof sheetstretchable elastic member extends in the diaper longitudinal directionbetween the absorbent core and each of the two lateral ends, acontraction force of the leakproof sheet stretchable elastic member anda contraction force of the waist stretchable elastic member intersectwith each other at a contraction force intersection region, each of thetwo longitudinal ends is erected by contraction of the leakproof sheetstretchable elastic member and forms an erected section, when thedisposable diaper is worn on the pet, each of the two longitudinal endshas a first curved part that is curved outwardly and adapted to curveaway from the pet, and the contraction force intersection region has asecond curved part that is curved inwardly and adapted to curve towardthe pet, the leakproof sheet stretchable elastic member forms leakproofgathers by contraction of the leakproof sheet stretchable elasticmember, the contraction force of the leakproof sheet stretchable elasticmember reaches the waist stretchable elastic member, the waiststretchable elastic member includes an abdomen-side waist stretchableelastic member in the abdomen-side waist area, and a back-side waiststretchable elastic member in the back-side waist area, and theleakproof sheet stretchable elastic member and the abdomen-side waiststretchable elastic member overlap each other in a diaper thicknessdirection crossing the diaper longitudinal direction and the diapertransverse direction.
 2. The disposable diaper as defined in claim 1,wherein a leakproof wall is formed by contraction of the leakproof sheetstretchable elastic member.
 3. The disposable diaper as defined in claim1, further comprising: an erection sheet in an end region of theabsorbent-core non-arrangement region in the diaper longitudinaldirection, wherein the erection sheet is erected by contraction of theleakproof sheet stretchable elastic member and forms the erectedsection.
 4. The disposable diaper as defined in claim 3, wherein theerection sheet comprises the abdomen-side waist stretchable elasticmember and the back-side waist stretchable elastic member.
 5. Thedisposable diaper as defined in claim 4, wherein the waist stretchableelastic member forms waist gathers by contraction of the abdomen-sidewaist stretchable elastic member and the back-side waist stretchableelastic member.
 6. The disposable diaper as defined in claim 1, wherein,when the disposable diaper is ready to be worn on the pet, the leakproofsheet stretchable elastic member is already contracted to form theerected section.
 7. The disposable diaper as defined in claim 1,wherein, while the disposable diaper is worn on the pet, the leakproofsheet stretchable elastic member maintains a contracted state to keepthe erected section in an erected state.
 8. The disposable diaper asdefined in claim 1, wherein the contraction force intersecting region isformed in the abdomen-side waist area.
 9. The disposable diaper asdefined in claim 1, wherein, when the disposable diaper is ready to beworn on the pet, the leakproof sheet stretchable elastic member, theabdomen-side waist stretchable elastic member, and the back-side waiststretchable elastic member are already contracted to already form thecontraction force intersecting region.
 10. The disposable diaper asdefined in claim 1, wherein, while the disposable diaper is worn on thepet, the leakproof sheet stretchable elastic member, the abdomen-sidewaist stretchable elastic member, and the back-side waist stretchableelastic member maintain a contracted state to maintain the contractionforce intersecting region.
 11. The disposable diaper as defined in claim1, wherein the erected section is formed on the longitudinal end in theabdomen-side waist area.
 12. The disposable diaper as defined in claim1, further comprising: a fixing part configured to fix the leakproofsheet stretchable elastic member onto the absorbent-core non-arrangementregion, wherein the absorbent-core non-arrangement region between thefixing part and the leakproof sheet stretchable elastic member iserected to form the erected section.
 13. The disposable diaper asdefined in claim 12, wherein the absorbent-core non-arrangement regionin the crotch area between the fixing part and the absorbent core iserected by contraction of the leakproof sheet stretchable elastic memberto form a crotch erected section.
 14. The disposable diaper as definedin claim 13, wherein the crotch erected section is formed between an endof the absorbent core in the diaper longitudinal direction and the tailinsertion opening in the crotch area.
 15. The disposable diaper asdefined in claim 13, wherein, when the disposable diaper is ready to beworn on the pet, the leakproof sheet stretchable elastic member isalready contracted to already form the crotch erected section.
 16. Thedisposable diaper as defined in claim 13, wherein, while the disposablediaper is worn on the pet, the leakproof sheet stretchable elasticmember maintains a contracted state to keep the crotch erected sectionin an erected state.
 17. The disposable diaper as defined in claim 13,wherein a leakproof wall is formed by contraction of the leakproof sheetstretchable elastic member, and an excrement storage space surrounded bythe leakproof wall, the crotch erected section, and the absorbent coreis formed.
 18. The disposable diaper as defined in claim 13, wherein theerected section is formed in the abdomen-side waist area and in theback-side waist area, a leakproof wall is formed by contraction of theleakproof sheet stretchable elastic member, and an excrement storagespace surrounded by the leakproof wall, the erected section in theabdomen-side waist area, the crotch erected section, and the absorbentcore is formed.
 19. The disposable diaper as defined in claim 1, furthercomprising a leg stretchable elastic member disposed adjacent to theleakproof sheet stretchable elastic member, wherein the leg stretchableelastic member and the back-side waist stretchable elastic memberoverlap each other in the diaper thickness direction, the legstretchable elastic member continuously extends from the abdomen-sidewaist area to the longitudinal end at the back-side waist area, and theleakproof sheet stretchable elastic member continuously extends from thecrotch area to the longitudinal end at the abdomen-side waist area.